Lock-nut.



v O. LUYTIES.

LOCK NUT. APPLICATION FILED MAR. 12, 1912.

Patentd Feb. 11,1913.

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ywlllfiwn I UNITED STATES PATENT .OFFIGE.

'o'r'ro LUYTIES, on NEW YORK, N. Y.

LOCK-NUT.

Specification of Letters Patent.

Patented Feb. 11, 1913.

Application filed March 12, 1912. Serial No. 683,263.

'To all whom it may concern Be it known that I, OTTO LUYTIES, a citizen of the United States, and a resident of New York cit in the county of New Yorklock nut which will automatically lock the nut to a bolt when the face of the nut is forced against an abutting surface.

A further object is to provide alock nut formed in a single piece.

. A further object is to provide a lock nut that will permanently change or distort the continuity of the thread of the bolt and of the nut for a limited distance when the nut is being set in locked position.

Referring to the drawings which form a part of'this specification, Figure l'is'a sectional view of a lock nut in locked relation on abolt and disclosing my invention. Fig. 2 is a sectional view showing the form of the nut before it islocked to a bolt. Fig; 3 is a cross sectional view on line 3-3 of Fig. 2. Fig. 4 is a view of the exterior appearance of the lock nut, the dotted lines indicating the threads and groove formed in the nut, the hexagonal faces in this form being rounded off adjacent to the locking portion of the nut. Flg. 5 isa cross sectional view on line 5-5 of Fig. 4. Fig. 6 is a, detail view on an enlarged scale indicating the distortion of the threads produced when the nut is locked in place.

A and A indicate two sheets of iron to g be bolted together, and B a bolt, the shank of which is provided with a thread B.

G indicates the body portion of my lock nut and G the lock portion thereof which preferably is integrally connected with the body portion C by a thin annular yielding, substantially non-resilient ring-like portion C thus forming a groove C around the axis of the. threaded opening through the nut. The body portion C may be provided with a square or hexagon surface as indicated at C, and the face of the lock portior C is preferably rounded or raised toward the axis of the nut as indicated at C and the outer surface C is preferably formed cylindrical so that the section C? may give more freely in the act of locking.-

D indicatesfthe usual internal thread of constant pitchformed in the nut and D is a direct continuation of said thread and is preferably formed at the same time that the thread is formed in the body portion, and consists of two or more complete turns. The space C is made quite wide and preferably .is as great in width or greater than the distance corresponding to two threads of the nut.

The nut is screwed on the bolt with the face C toward the abutting surface of the 7 sheet A and [screwed against said sheet with suflicient force to bend the rin portion' C and sometimes to permanent y"dis tort same as indicated in Fig. 1. The face of the lock portion 0 is forced toward the bodyportion causing a distortion of the continuity of the threads formed/in the lock portion relatively to the body portion and causing the lock portion to take a perma'nent seat in locked relation to the bolt as indicated in Fig." 1.

By exerting suflicient pressure on the body portion, the under side of the lock portion C can be forced down into contact with the top portion'C and in this event the thread of the lock portion of the bolt within said lock portion becomes badly distorted and bodily shifted under some conditions depending on the toughness of the metal, but'in view of thefact that the body portion 0 is provided with a comparatively long thread, the strength of the nut and bolt is not seriously impaired and the nut as a whole becomes firmly and permanently locked to the bolt.

Referring to the enlarged detail view v shown in Fig. 6, it will be noted that the thread B ofthe bolt has been shifted bodily toward thread B as indicated by the space B between threads B and B It will be noted also that the thread B is somewhat distorted with reference to the adjacent thread B Of course the threads in the locking portion C of the nut are distorted correspondingly.

It will thus be seen-that after the nut is once looked, it will be diflicult to unscrew the same and the resistance ofl'ered toward its unscrewing will be permanent and. will continue in any position that the nut may assume during the process of removal, even after being backed ofl from the abutment.

Having thus described my invention, I claim as new 1. A look nut comprising a nut having a body portion and a locking portion, an annular yielding substantially non-resilient connection for connecting sald two rtions,

the latter both having acontinu us thread adapted to easily screw on a bolt. 2. A look nut comprising a nut having a body portion and a locking portion, an annular yielding substantially vnon-resilien't connection for connecting said two portions,

the latter both having a continuous thread ,1 adapted to easily screw on a bolt, said lockbody portion and a locking portion, both portions having a continuous'thread adapted to easilyscrew on a bolt, said portions being connected to eachother at a plurality of points bya yielding substantially nonresilient connection, adapted to be perma;

nently distorted by engagement with will? fibiitment when the nut is screwed 'on to the o t.

4, A-lock nut comprising a nut having'a body portion and a locln'ng .portion, bothportions having a continuous thread adapted-to easily screw on a bolt, said portions being connected to each other at a plurality of points by a yielding substantially nonresilientconnection, and said locking portion having fewer threads than said body portion and, adapted to be distorted by thecpmparatively larger force which is trans,- mitted by said body portion.

Signed\ at New York city in the county of New York and State of New York this 6th day of March-A. D. 19 12.

- OTTO 'LUYTIES.

Witnesses: I

FRANK M. ASHLEY, MANUEL M. Vorr. 

